In biology & in the general feel, terrestrial means indicates ground-living (compare aquatic). View land. In broadcasting terrestrial indicates that TV or even radio signals come received across the conventional aerial. Look at terrestrial television. In communication networking, "terrestrial" indicates signals travelling across fiber optic cable or copper wire, usually situated underground or even submarine. In uranology, terrestrial may refer to the number 1 4 planets in the solar system—planets by owning the rough exterior. Terrestrial might besides exist as utilized inside counterpoint to extra-terrestrial, indicating anything of Earth-origin like than from either outer space.